mgu FY2013 Annual Report 3.1 fig3

Figure 3. Architecture of Genes and Splice Site Motifs in the Nuclear Genomes of Representative Eukaryotes and Alveolates. Green boxes indicate typical patterns of ten-gene arrangements with the number of strand-switch regions (SSRs), although the SSRs shown here are not always typical. Patterns are based on the analyses shown in Figure 6. Gene architecture shows average gene lengths (exons in red and introns in blue) with the average intron number per gene. The sequence motif of the splice site is illustrated with WebLogo. Only two genes with spliceosomal introns in Trypanosoma brucei have been reported, but the motif was not shown. The unusual gene organization on the same strand of DNA shows similarities between Symbiodinium and Trypanosoma. Additionally, analyses of intron richness and the weakness of 50 splice site signals (asterisk) indicate that Symbiodinium has the most unusual genome organization found in a eukaryote genome to date. The probability of position 2 at the 50 splice site is shown in inset. A double asterisk shows G conserved at the 30 splice site. per site.